Mailbox crown



FIG. 1 is a front perspective view of a mailbox crown showing my new design;

FIG. 2 is a rear perspective view thereof; and,

FIG. 3 is a front perspective view thereof, in use.

All sides not shown in the drawing disclosure forms no part of the claimed design.

The broken line showing of a mailbox is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

The ornamental design for a mailbox crown, as shown and described. 